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GeForce 8800 GTS (G80) 320MB vs Radeon HD 6870

Intro

The GeForce 8800 GTS (G80) 320MB features a clock speed of 513 MHz and a GDDR3 memory frequency of 792 MHz. It also makes use of a 320-bit bus, and uses a 90 nm design. It features 96 SPUs, 48 TAUs, and 20 Raster Operation Units.

Compare those specs to the Radeon HD 6870, which features GPU core speed of 900 MHz, and 1024 MB of GDDR5 RAM set to run at 1050 MHz through a 256-bit bus. It also is comprised of 1120 Stream Processors, 56 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 320MB 143 Watts
Radeon HD 6870 151 Watts
Difference: 8 Watts (6%)

Memory Bandwidth

The Radeon HD 6870, in theory, should perform much faster than the GeForce 8800 GTS (G80) 320MB overall. (explain)

Radeon HD 6870 134400 MB/sec
GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Difference: 71040 (112%)

Texel Rate

The Radeon HD 6870 will be much (more or less 105%) better at texture filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon HD 6870 50400 Mtexels/sec
GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
Difference: 25776 (105%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6870 is superior to the GeForce 8800 GTS (G80) 320MB, by a large margin. (explain)

Radeon HD 6870 28800 Mpixels/sec
GeForce 8800 GTS (G80) 320MB 10260 Mpixels/sec
Difference: 18540 (181%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce 8800 GTS (G80) 320MB

Amazon.com

Check prices at:

Radeon HD 6870

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 8800 GTS (G80) 320MB Radeon HD 6870
Manufacturer nVidia AMD
Year Feb 2007 October 2010
Code Name G80 Barts XT
Memory 320 MB 1024 MB
Core Speed 513 MHz 900 MHz
Memory Speed 1584 MHz 4200 MHz
Power (Max TDP) 143 watts 151 watts
Bandwidth 63360 MB/sec 134400 MB/sec
Texel Rate 24624 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 96 1120
Texture Mapping Units 48 56
Render Output Units 20 32
Bus Type GDDR3 GDDR5
Bus Width 320-bit 256-bit
Fab Process 90 nm 40 nm
Transistors 681 million 1700 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 320MB

Amazon.com

Check prices at:

Radeon HD 6870

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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